Experiment of effect of crude extract from the leaves of the leaf รางแดง RA red, as shown in (picture 1) crude extract by solvent ใบรางแดง ethanol concentration of 95 characteristics of viscous liquid. Dark green to black fragrance.F.Oxysporum at different concentrations 5 levels, it was found that the crude extract concentration 0 5000 10000 15000 20000, and ppm The average diameter of the colony F. Oxysporum was 8.00 5.14 and 4.99 4.77 4.74 cm, with the average percent inhibition 0.00 35.75 37.And 63 40.38 40.75 respectively. When analyzing the difference, it was found that the crude extract, concentration and 15000 20000 ppm inhibited the growth of F. Oxysporum best
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